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Vulnerability · Published Dec 29, 2024 · Assigned by Linux

CVE-2024-56721x86/CPU/AMD: Terminate the erratum_1386_microcode array

High 7.1

In plain English

A high-severity out-of-bounds read in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 86.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Terminate the erratum_1386_microcode array The erratum_1386_microcode array requires an empty entry at the end. Otherwise x86_match_cpu_with_stepping() will continue iterate the array after it ended. Add an empty entry to erratum_1386_microcode to its end.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.3-1DEBIAN-CVE-2024-56721
Debian:14linux6.12.3-1DEBIAN-CVE-2024-56721
Rocky Linux:10kernel0:6.12.0-55.27.1.el10_0RLSA-2025:13598
Ubuntu:22.04:LTSlinux5.15.0-140.150UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux5.15.0-140.150USN-7510-1
Ubuntu:24.04:LTSlinux6.8.0-58.60UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-aws5.15.0-1084.91UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-aws5.15.0-1084.91USN-7510-7
Ubuntu:24.04:LTSlinux-aws6.8.0-1027.29UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1027.29~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure5.15.0-1089.98UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure5.15.0-1089.98USN-7510-3
Ubuntu:24.04:LTSlinux-azure6.8.0-1027.32UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1027.32~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1089.98.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1014.15UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gcp5.15.0-1083.92UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gcp5.15.0-1083.92USN-7511-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1028.30UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1011.11~24.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1028.30~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gke5.15.0-1081.87USN-7511-3
Ubuntu:22.04:LTSlinux-gke5.15.0-1081.87UBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-gke6.8.0-1023.27UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1066.74UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1066.74USN-7510-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1010.12UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-58.60~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-ibm5.15.0-1076.79USN-7510-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1076.79UBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-ibm6.8.0-1024.24UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1024.24~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1079.85UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1079.85USN-7510-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1080.85UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-kvm5.15.0-1080.85USN-7510-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-140.150UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-140.150USN-7510-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-58.60.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-58.60.1~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1078.79UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1078.79USN-7510-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1026.29UBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1007.7UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1026.29~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1026.29.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1037.37UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1037.37USN-7510-3
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1008.8UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1026.26UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1026.26USN-7510-7
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1015.15UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1026.26UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-oracle5.15.0-1081.87USN-7510-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1081.87UBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-oracle6.8.0-1024.25UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1024.25~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-raspi5.15.0-1078.81USN-7510-7
Ubuntu:22.04:LTSlinux-raspi5.15.0-1078.81UBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-raspi6.8.0-1028.32UBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-riscv6.8.0-58.60.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-58.60.1~22.04.1UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-56721
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1050.54UBUNTU-CVE-2024-56721
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1050.54USN-7602-1

Affected products (as reported)

VendorProductVersions
Linux Linux 29ba89f1895285f06c333546882e0c5ae9a6df23 – before 82d6b82cf89d950982ac240ba068c3a7e1f23b0a29ba89f1895285f06c333546882e0c5ae9a6df23 – before ccfee14f08b8699132b87bc6d78e0fa75bf094dd29ba89f1895285f06c333546882e0c5ae9a6df23 – before ff6cdc407f4179748f4673c39b0921503199a0ad
Linux Linux 6.10

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

References